KUM-DO is really beneficial for several reasons. First, KUM-DO improves my concentration ability. Because the wooden sward is not light, it requires a lot of concentration for me to brandish accurately. The accurate KUM-DO action cannot be made without concentration. Second, it improves my physical strength. After I practice sward action many times, I can feel that I gain muscle and power. I think that only holding the sward require substantial amounts of physical strength. Finally, it gives me motivation for life. After I work out hard, I am usually soaked with perspiration. Whenever I sweat profusely, I feel that I ‘m alive. Perspiration encourages me to live with positive and refreshing mind.